Published March 26, 1996 | Version v1
Patent Metadata-only

Control rod positioning detector

Creators

  • 1. Toshiba Engineering Co. Ltd., Kawasaki, Kanagawa (Japan)

Description

The present invention concerns a device capable of detecting insertion of all control rods simply, reliably and rapidly upon inspection and detection of control rod mechanisms. An inspection tube incorporated with an inspection lead switch capable of detecting the insertion of all control rods is attached to the control rod drive mechanism instead of a detection tube which is detached upon inspection of the control rod drive mechanisms. Then, the insertion of all control rods can always be detected and confirmed by the lead switch and permanent magnets. As a result, the number of the control rod drive mechanisms to be inspected is not limited only two, but optional number of them can be inspected. Further, removal of fuels and withdrawal of control rods are on more necessary to enhance simplification, rapidness and safety of the inspection operation. (N.H.)

Availability note (English)

Available from JAPIO. Also available from EPO.

Additional details

Publishing Information

Imprint Pagination
10 p.
IPC:
Int. Cl. G21C17/10; G21C17/12.
IPC
Int. Cl. G21C17/10; G21C17/12.
Patent number
JP patent document 8-82694/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
27066097
Subject category
S22: GENERAL STUDIES OF NUCLEAR REACTORS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
BWR TYPE REACTORS; CONTROL ELEMENTS; CONTROL ROD DRIVES; FASTENERS; FUEL ASSEMBLIES; IN-SERVICE INSPECTION; JOINING; PERMANENT MAGNETS; POSITION SENSITIVE DETECTORS; SWITCHES; TUBES
Descriptors DEC
ELECTRICAL EQUIPMENT; ENRICHED URANIUM REACTORS; EQUIPMENT; FABRICATION; INSPECTION; MAGNETS; MEASURING INSTRUMENTS; POWER REACTORS; RADIATION DETECTORS; REACTOR COMPONENTS; REACTORS; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS

Optional Information

Secondary number(s)
JP patent application 7-112791.